Fourths to heilner



(No Model.)

P. KERN.

SHUTTLE AGTUATING MECHANISM FOR DUPLEX NEEDLE SEWING MACHINES.

FERDINAND KERN, OF NEIV ARK, NEW JERSEY, ASSIGNOR OF THREE- FOURTHS TO IIEILNER & STRAUSS, OF NEIV YORK, N. Y.

SHUTTLE-ACTUATING MECHANISM FOR DUPLEX-NEEDLE SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 447,880, dated March 10, 1891.

Application filed September 7, 1889. $erial No. 323,262. (No model.)

To all whom it may concern.-

Be it known that I, FERDINAND KERN, of Newark, New Jersey, have invented a new and useful Improvement in Sewing-Machines, of which the following is a specification.

This invention consists in an improvement on the machine described in an application filed by me February 21, 1889, Serial No. 300,791, and it will be only necessary for me to describe herein those parts in which the present machine differs from that described in said application. These differences reside in the means by which the mechanism for driving the supplemental shuttle is made we tensible.

In the drawings, Figure 1 is an inverted plan View of the machine. Fig. 2 is a vertical section showing principally those portions below the plate. Fig. 3 is a detail showing disks 7L and 2'.

a is the table of the machine.

Z) is the presser-foot.

c is the needle-bar.

d is one needle, and d is the other. The rotating shuttles face each other at e and e',respectively,being mounted at the ends of their respective driving-shafts f and f.

I will now describe the mechanism employed in driving the shaftsfandf'.

g is the connecting-rod depending from the main shaft in the bracket-arm of the machine. This connecting-rod terminates at its lower end in two branches g and g h and i are two disks mounted, respectively, upon the end of the shaftfand of the sleeve j. These disks are slotted at h and z" to receive the pins g and g of the connecting-rod g.

j is a short shaft for connecting the sleeves j and 3' It has its bearings in the hanger k, and in operation is fixed to the sleeves j and 7' so as to move as in one piece therewith. The shaft Z has its bearings in the hangers 70', R and 2: It enters the sleeve 7' forming a telescope-joint therewith, prevented from turning by the set-screws Z and Z adapted to slide in the longitudinal slots l and Z of the sleeve 7' The supplemental table a, carrying shaft f and its shuttle, is supported and movable, as described in said application, and the same is true of the connections between the shafts f and l. It will be observed, hoW- ever, that the shafts f and Zhere have independent connections with the connecting-rod g, and that the mechanism for driving the supplemental shuttle is made extensible by the telescope-joint already referred to.

The manner in which I prefer to mount the bobbins is described in Letters Patent to me, No. 436,002, dated September 9, 1890.

I do not. desire to limit myself to the details or form of construction.

I claim 1. In a duplex-needle machine, in combination with the shafts by which the shuttles are actuated, the forked connecting-rod, whereby motion is transmitted from the needle-bar shaft to both shuttle-shafts, substantially as set forth.

2. In a duplex-needle machine,in combination, the needle'aetuating shaft, the shuttleactuating shafts, the forked connecting-rod, and a grooved disk interposed between each shuttle-shaft and a prong of the forked connecting-rod, substantially as set forth.

3. In a duplex-needle machine,in combination, the shaft for driving the needle, the shaft f for driving a stationary shuttle, the shafts f and Z for driving a movable shuttle, (the latter shaft being provided with a telescopejoint,) and a forked connecting-rod g, whereby motion is imparted from the needle-shaft to the respective shuttle-shafts, substantially as described.

FERDINAND KERN.

Witnesses:

J. E. GREEK, WM. M. ILIFF. 

